* {
	font-size: 10px;
	font-family: "Verdana";
	margin: 0px; 
}

body {
	text-align:center;
}

.titulo {
	font-size: 30px;
	font-weight: bold;
}

.header {
	height: 20%;
	width: 100%;
	background-color: #DDD;
	margin: 0px auto 0px auto;
}

.cos {
	position: relative;
	width: 100%;
	top: 10px;
	margin: 0px auto 0px auto ;
}

.footer {
	position: absolute;
	width: 100%;
	heigth: 30px;
	bottom: 0px;
	background-color: #DDD;
	margin: 0px auto 0px auto ;
}